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Maca, also sometimes referred to as Peruvian Ginseng, is a
hardy plant that was long ago discovered at high altitudes in the Andes
Mountains of South America. Its Peruvian region of growth is known as "among the
world's worst farmland," with sub-freezing temperatures and wind strong enough
to knock people off their horses. Possibly the only crop in the world capable of
growing at altitudes of up to 14,500 feet above sea level, maca was domesticated
by the Incas as early as 1600 B.C.

Robust Biochemistry

On nutritional and biochemical scales, maca has a diverse and robust profile.
Although the variety of nutrients found in maca are important for the local population,
the real interest in maca abroad is due to the potential benefits of the
bioactive compounds, such as the glucosinolates (including their derived
isothiocyanates and p-methoxybenzyl isothiocyanate). Isothiocyanates are common
in the Brassicaceae family of plants, which includes the important cruciferous
vegetables, such as cabbage, broccoli, Brussels sprouts, turnips, and radishes;
in fact, dried maca looks quite like dried turnips or radishes. It has been
suggested that the p-methoxybenzyl isothiocyanates found in maca is in part
responsible for some of its traditional health applications.

In addition to holding great value as a dietary staple due to its nutritional
value, maca also is prized for its traditional health-promoting uses.

The Science Behind Maca

In 2000, results from a study of mice revealed for the first time that
benefits claimed in folklore had some credence: two maca extracts significantly
enhanced the libido and mating performance of normal mice. The following year, a
human study was published, with results that demonstrated superior semen
parameters in men receiving maca tablets for 4 months. In 2002, a randomized,
double-blind, placebo-controlled 12-week parallel trial in healthy men aged
21–56 years was published. Sexual desire improved in the men administered maca
tablets, independently of changes in mood or blood hormone levels (testosterone
levels did not change when using maca). In 2008, interesting results were also
seen in a preliminary study of 14 postmenopausal women. In this randomized,
double-blind, placebo-controlled crossover trial, maca supplementation for 6
weeks did not exert an estrogenic effect, yet it appeared to be useful in
supporting a positive mental attitude towards sexual activity, compared to
placebo. Results from a 2010 meta-analysis that included yet more human studies
(of both men and women) suggested that maca positively influences sexual health;
however, further research is warranted in these areas.

Maca is traditionally used as an adaptogen—a plant known to influence the body's response to physical, biochemical, and psychological stressors. In modern times, its role as an adaptogen is no less useful than 2,000 years ago.*

† Compensated Spokesperson

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